/Engine/Source/Runtime/RHI/Public/RHIGPUReadback.h
FRHIGPUMemoryReadback: Represents a memory readback request scheduled with CopyToStagingBuffer Wraps a staging buffer with aFRHIGPUFencefor synchronization.
class FRHIGPUMemoryReadback
FGPUFenceRHIRef
Fence
FRHIGPUMask
LastCopyGPUMask
uint32
LastLockGPUIndex
We need to separately track which GPU buffer was last locked.